Electronic Control "LCM" User Manual
firmware 0.06 Rev.02 EN 10/ 15
6.5. External dampers
External dampers are open when the unit is turned On
They are closed when the unit is turned Off with a delay from the fan stop
Moreover the dampers can be close in the following cases:
Unit stopped by alarm
Antifreeze active
Winter start-up (with mixing chamber)
6.6. Freecooling-heating
Free-cooling is disabled if fresh air temperature is lower than a set point (with an hysteresis)
Free-cooling is active when the fresh air temperature is lower than set point temperature – free-cooling differential
and the unit is in cooling mode
Free-heating is active when the fresh air temperature is higher than set point temperature + free-heating differential
and the unit is in heating mode
6.7. Heating
Heating is done by a valve or an electrical heater (depending on plant type).
Minimum water temperature
Hot valve is enabled if digital input DI1 (expansion card) is close.
This alarm is automatically reset and activate the general alarm output
Heating element
The heating element s activated by set point and a differential
The 3 point valve is regulated proportionally on the set point
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